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https://www.readbyqxmd.com/read/28708159/orbital-angular-momentum-beams-generated-by-passive-dielectric-phase-masks-and-their-performance-in-a-communication-link
#1
Zhe Wang, Yan Yan, Amir Arbabi, Guodong Xie, Cong Liu, Zhe Zhao, Yongxiong Ren, Long Li, Nisar Ahmed, Asher J Willner, Ehsan Arbabi, Andrei Faraon, Robert Bock, Solyman Ashrafi, Moshe Tur, Alan E Willner
We demonstrate the generation of orbital angular momentum (OAM) beams using high-efficient polarization-insensitive phase masks. The OAM beams generated by the phase masks are characterized in terms of their tolerance to misalignment (lateral displacement or tilt) between the incident beam and phase mask. For certain scenarios, our results show that (a) when the tilt angle is within the range of -20 to +20  deg, the crosstalk among modes is less than -15  dB; and (b) lateral displacement of 0.3 mm could cause a large amount of power leaked to adjacent modes...
July 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28675548/neopuff-t-piece-resuscitator-mask-ventilation-does-mask-leak-vary-with-different-peak-inspiratory-pressures-in-a-manikin-model
#2
Rajesh Maheshwari, Mark Tracy, Murray Hinder, Audrey Wright
AIM: The aim of this study was to compare mask leak with three different peak inspiratory pressure (PIP) settings during T-piece resuscitator (TPR; Neopuff) mask ventilation on a neonatal manikin model. METHODS: Participants were neonatal unit staff members. They were instructed to provide mask ventilation with a TPR with three PIP settings (20, 30, 40 cm H2 O) chosen in a random order. Each episode was for 2 min with 2-min rest period. Flow rate and positive end-expiratory pressure (PEEP) were kept constant...
July 4, 2017: Journal of Paediatrics and Child Health
https://www.readbyqxmd.com/read/28655952/a-novel-technique-for-insertion-of-proseal%C3%A2-laryngeal-mask-airway-comparison-of-the-stylet-tool-with-the-introducer-tool-in-a-prospective-randomised-study
#3
Sheila Nainan Myatra, Vijaykumar Khandale, Friedrich Pühringer, Sushan Gupta, Sohan Lal Solanki, Jigeeshu V Divatia
BACKGROUND AND AIMS: The ProSeal™ laryngeal mask airway (PLMA) has a soft cuff which tends to fold on itself during insertion, resulting in reduced first-attempt success rate. We compared the standard introducer technique of PLMA insertion with a novel method to prevent folding of the cuff using a Rüsch™ Stylet. METHODS: This randomised superiority trial included 120 American Society of Anesthesiologists I-II patients between 18 and 80 years, undergoing elective surgeries under general anaesthesia using a PLMA for airway management...
June 2017: Indian Journal of Anaesthesia
https://www.readbyqxmd.com/read/28655951/comparative-evaluation-of-ambu-auragain%C3%A2-with-proseal%C3%A2-laryngeal-mask-airway-in-patients-undergoing-laparoscopic-cholecystectomy
#4
Kriti Singh, Pavan Gurha
BACKGROUND AND AIMS: Second generation supraglottic airways are increasingly being used in surgical patients undergoing laparoscopic surgery. Preventing aspiration at higher airway pressures may be at the expense of a higher cuff pressure which can impair mucosal perfusion. We attempted to elucidate whether Ambu AuraGain™ (AAU) would provide a higher oropharyngeal leak pressure (OLP) with a lower mucosal pressure in comparison to ProSeal™ laryngeal mask airway (PLMA). METHODS: This was a prospective randomised study involving sixty patients undergoing laparoscopic cholecystectomy under general anaesthesia, using either AAU (Group AAU [n = 30]) or PLMA (Group PLMA [n = 30]) for elective ventilation...
June 2017: Indian Journal of Anaesthesia
https://www.readbyqxmd.com/read/28648227/the-management-privacy-and-medico-legal-issues-of-electronic-cpap-data-in-australia-and-new-zealand-electronic-cpap-data-management-in-australia-and-new-zealand
#5
John Swieca, Garun S Hamilton, Hailey Meaklim
STUDY OBJECTIVE: Continuous Positive Airway Pressure (CPAP) is considered to be the gold standard treatment for obstructive sleep apnoea (OSA). CPAP monitoring systems allow tracking of patient CPAP adherence and treatment efficacy, by measuring residual sleep-disordered breathing, hours of CPAP use, and mask leak etc. The American Thoracic Society (ATS) published a position paper in 2013 highlighting issues of interpreting CPAP data such as a lack of consistency between CPAP manufacturers data algorithms, legal implications of CPAP data and implications for CPAP adherence...
August 2017: Sleep Medicine
https://www.readbyqxmd.com/read/28630218/mistaken-identity-haemoglobinuria-secondary-to-paravalvular-leak-masking-as-haematuria
#6
Sam Meadows, Patrick Gordon, Richard Inman
Haemolytic anaemia caused by a paravalvular leak presenting as progressively worsening red urine. Haemoglobinuria was easily mistaken for gross haematuria, resulting in extensive invasive urological investigation that proved to be futile. Further investigation following an emergency admission led to the realisation that intravascular haemolysis secondary to a paravalvular leakâ€"presenting 43 years following metallic valve insertionâ€"was the cause of discoloured urine and newly presenting symptomatic anaemia...
June 19, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28621182/-non-intubated-uniportal-video-assisted-thoracic-surgery-vats-lobectomy-as-a-new-procedure-in-our-department
#7
József Furák, Zsolt Szabó, Theodor Horváth, Tibor Géczi, Balázs Pécsy, Tibor Németh, Aurél Ottlakán, Zsolt Molnár, György Lázár
AIM: Due to the emerging experience in VATS (video assisted thoracic surgery) lobectomies, in some centers the so called "non-intubated" VATS lobectomies (NITS - non-intubated thoracic surgery) gained increased authority, during which endotracheal intubation and muscle relaxation of the patient is not carried out, thus surgery is being performed with the patient breathing spontaneously. The recent study deals with our initial experience gained during uniportal NITS VATS lobectomies. PATIENTS AND METHOD: Between 24...
June 2017: Magyar Sebészet
https://www.readbyqxmd.com/read/28618734/a-comparison-of-usage-of-the-laryngeal-mask-unique-tm-in-denticulate-and-edentulate-geriatric-patients
#8
Meltem Genez, Semih Küçükgüçlü, Şule Özbilgin, Bahar Kuvaki, Tangül Beydeş, Melek Aksoy Sari
BACKGROUND/AIM: Mask ventilation in geriatric and edentulous patients can be ineffective or even impossible because of the shape inside the patients' cheeks. For patients for whom a mask cannot be used for long, the use of a laryngeal mask can ease the administration of anesthesia. The aim of this study was to compare the use of the laryngeal mask Unique(TM) in denticulate and edentulate patients aged over 65 years. MATERIALS AND METHODS: This prospective study included patients according to the American Society of Anesthesiologists I-III classification, aged 65 years or more...
June 12, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28609480/an-automated-and-reliable-method-for-breath-detection-during-variable-mask-pressures-in-awake-and-sleeping-humans
#9
Chinh D Nguyen, Jason Amatoury, Jayne C Carberry, Danny J Eckert
Accurate breath detection is crucial in sleep and respiratory physiology research and in several clinical settings. However, this process is technically challenging due to measurement and physiological artifacts and other factors such as variable leaks in the breathing circuit. Recently developed techniques to quantify the multiple causes of obstructive sleep apnea, require intermittent changes in airway pressure applied to a breathing mask. This presents an additional unique challenge for breath detection...
2017: PloS One
https://www.readbyqxmd.com/read/28584349/comparison-of-actual-and-ideal-body-weight-for-selection-of-appropriate-size-of-proseal%C3%A2-laryngeal-mask-airway-in-overweight-and-obese-patients-a-prospective-randomised-study
#10
Sohan Lal Solanki, Jeson R Doctor, Kamlesh K Shekhawat, Sheila Nainan Myatra, Malini Joshi, Jigeeshu V Divatia
BACKGROUND AND AIMS: The ProSeal™ laryngeal mask airway (PLMA) has advantages of providing better cuff seal and the presence of a gastric drain tube. The manufacturer recommends actual body weight (ABW) for size selection. Pharyngeal area reduces with increase in body mass index (BMI); hence, in overweight patients, PLMA selected on ABW may not fit well. We hypothesised that the ideal body weight (IBW) would be more appropriate in size selection of PLMA. METHODS: This randomised, single-blind study included 124 patients of 20-60 years and American Society of Anesthesiologists Class I-II, with BMI >25...
May 2017: Indian Journal of Anaesthesia
https://www.readbyqxmd.com/read/28570294/blind-intubation-through-self-pressurized-disposable-supraglottic-airway-laryngeal-intubation-masks-an-international-multicenter-prospective-cohort-study
#11
Kurt Ruetzler, Sandra Esther Guzzella, David Werner Tscholl, Tanja Restin, Marco Cribari, Alparslan Turan, Jing You, Daniel I Sessler, Burkhardt Seifert, Tomasz Gaszynski, Michael T Ganter, Donat R Spahn
BACKGROUND: Supraglottic airway devices commonly are used for securing the airway during general anesthesia. Occasionally, intubation with an endotracheal tube through a supraglottic airway is indicated. Reported success rates for blind intubation range from 15 to 97%. The authors thus investigated as their primary outcome the fraction of patients who could be intubated blindly with an Air-Qsp supraglottic airway device (Mercury Medical, USA). Second, the authors investigated the influence of muscle relaxation on air leakage pressure, predictors for failed blind intubation, and associated complications of using the supraglottic airway device...
August 2017: Anesthesiology
https://www.readbyqxmd.com/read/28558864/a-randomized-crossover-trial-comparing-autotitrating-and-continuous-positive-airway-pressure-in-subjects-with-symptoms-of-aerophagia-effects-on-compliance-and-subjective-symptoms
#12
Teresa Shirlaw, Kevin Hanssen, Brett Duce, Craig Hukins
STUDY OBJECTIVES: To assess the benefit and tolerance of autotitrating positive airway pressure (APAP) versus continuous positive airway pressure (CPAP) in subjects who experience aerophagia. METHODS: This is the report of a prospective, two-week, double-blinded, randomized crossover trial set in an Australian clinical sleep laboratory in a tertiary hospital. Fifty-six subjects who reported symptoms of aerophagia that they attributed to CPAP were recruited. Full face masks were used by 39 of the 56 subjects recruited...
July 15, 2017: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
https://www.readbyqxmd.com/read/28528760/experimental-evaluation-of-four-airway-devices-in-anaesthetized-new-zealand-white-rabbits
#13
Sandra Wenger, Désirée Müllhaupt, Stefanie Ohlerth, Sarah Prasse, Karina Klein, Bianca da Silva Valente, Martina Mosing
OBJECTIVE: To compare airway management during induction of anaesthesia, spontaneous ventilation (SV) and controlled mechanical ventilation (CMV), using an endotracheal tube (ETT), laryngeal mask (LM), rabbit-specific supraglottic airway device (v-gel) or facemask (FM). STUDY DESIGN: Prospective randomized crossover experiment. ANIMALS: Ten New Zealand White rabbits. METHODS: After premedication, rabbits were randomly allocated to four groups: 1) ETT; 2) LM; 3) v-gel or 4) FM...
January 11, 2017: Veterinary Anaesthesia and Analgesia
https://www.readbyqxmd.com/read/28508568/randomized-crossover-trial-of-a-pressure-sensing-visual-feedback-system-to-improve-mask-fitting-in-noninvasive-ventilation
#14
Anne-Kathrin Brill, Mohammad Moghal, Mary J Morrell, Anita K Simonds
BACKGROUND AND OBJECTIVE: A good mask fit, avoiding air leaks and pressure effects on the skin are key elements for a successful noninvasive ventilation (NIV). However, delivering practical training for NIV is challenging, and it takes time to build experience and competency. This study investigated whether a pressure sensing system with real-time visual feedback improved mask fitting. METHODS: During an NIV training session, 30 healthcare professionals (14 trained in mask fitting and 16 untrained) performed two mask fittings on the same healthy volunteer in a randomized order: one using standard mask-fitting procedures and one with additional visual feedback on mask pressure on the nasal bridge...
May 15, 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28476473/decrease-in-delivery-room-intubation-rates-after-use-of-nasal-intermittent-positive-pressure-ventilation-in-the-delivery-room-for-resuscitation-of-very-low-birth-weight-infants
#15
Manoj Biniwale, Fiona Wertheimer
BACKGROUND: The literature supports minimizing duration of invasive ventilation to decrease lung injury in premature infants. Neonatal Resuscitation Program recommended use of non-invasive ventilation (NIV) in delivery room for infants requiring prolonged respiratory support. OBJECTIVE: To evaluate the impact of implementation of non-invasive ventilation (NIV) using nasal intermittent positive pressure ventilation (NIPPV) for resuscitation in very low birth infants...
July 2017: Resuscitation
https://www.readbyqxmd.com/read/28439597/ambu-auraonce-versus-i-gel-laryngeal-mask-airway-in-infants-and-children-undergoing-surgical-procedures-a-randomized-controlled-trial
#16
Abdulrahman M Alzahem, Mansoor Aqil, Tariq A Alzahrani, Ayman H Aljazaeri
To compare the efficacy and performance of the pediatric Ambu AuraOnce (Ambu AO) mask (Ambu, Copenhagen, Denmark) and i-gel mask (Intersurgical Ltd., Wokingham, United Kingdom). Methods: From May 2015 to September 2016, 112 patients, 0-14 years old, underwent elective surgery at a tertiary university hospital (Riyadh, Saudi Arabia). They were randomly assigned to the Ambu AO or i-gel group. Three groups underwent a subgroup analysis: ≤5 kg (group 1), 5.1-10.0 kg (group 2), and >10 kg (group 3). Results: The oropharyngeal leak pressure was significantly higher for the i-gel (25...
May 2017: Saudi Medical Journal
https://www.readbyqxmd.com/read/28298784/ventilation-of-nonparalyzed-patients-under-anesthesia-with-laryngeal-mask-airway-comparison-of-three-modes-of-ventilation-volume-controlled-ventilation-pressure-controlled-ventilation-and-pressure-controlled-ventilation-volume-guarantee
#17
Maroun Badwi Ghabach, Elie M El Hajj, Rouba D El Dib, Jeanette M Rkaiby, May S Matta, May R Helou
BACKGROUND: Pressure controlled ventilation (PCV) is the preferable mode of ventilation of nonparalyzed patients undergoing anesthesia with laryngeal mask airway (LMA) as compared to volume controlled ventilation (VCV) and spontaneously breathing patient. In this study, we compared the PC-volume guarantee (PC-VG) mode of ventilation with VCV and PCV modes. MATERIALS AND METHODS: A total of 30 patients, American Society of Anesthesiologists (ASA) physical status Classes I and II, scheduled for elective surgery under general anesthesia with a classic LMA were ventilated, subsequently, with the three modes of ventilation: VCV, PCV, and PC-VG for 10 min each mode...
January 2017: Anesthesia, Essays and Researches
https://www.readbyqxmd.com/read/28298751/comparative-study-of-two-laryngeal-mask-airways-proseal-laryngeal-mask-airway-and-supreme-laryngeal-mask-airway-in-anesthetized-paralyzed-adults-undergoing-elective-surgery
#18
Ravneet Kaur Gill, Abhijit Tarat, Debagopal Pathak, Suneeta Dutta
CONTEXT: Supraglottic airway devices can act as an alternative to endotracheal intubation in both normal and difficult airway. LMA Proseal (P-LMA) and LMA Supreme (S-LMA) alongwith acting as effective ventilating device, provide port for gastric drainage. AIM: The objective of this study was to compare the two devices for effective ventilation and complications. SETTING AND DESIGN: A prospective, randomized, single-blinded study was conducted in a tertiary care teaching hospital...
January 2017: Anesthesia, Essays and Researches
https://www.readbyqxmd.com/read/28241517/real-time-imaging-of-methane-gas-leaks-using-a-single-pixel-camera
#19
Graham M Gibson, Baoqing Sun, Matthew P Edgar, David B Phillips, Nils Hempler, Gareth T Maker, Graeme P A Malcolm, Miles J Padgett
We demonstrate a camera which can image methane gas at video rates, using only a single-pixel detector and structured illumination. The light source is an infrared laser diode operating at 1.651μm tuned to an absorption line of methane gas. The light is structured using an addressable micromirror array to pattern the laser output with a sequence of Hadamard masks. The resulting backscattered light is recorded using a single-pixel InGaAs detector which provides a measure of the correlation between the projected patterns and the gas distribution in the scene...
February 20, 2017: Optics Express
https://www.readbyqxmd.com/read/28223464/reversal-of-pap-failure-with-the-repap-protocol
#20
Barry Krakow, Victor A Ulibarri, Natalia D McIver, Carli Yonemoto, Alyssa Tidler, Jessica Obando, Michelle R Foley-Shea, Jonathan Ornelas, Spencer Dawson
BACKGROUND: Re-titrations, an atypical approach to reverse PAP failure, was investigated retrospectively. METHODS: Application of our re-titration of PAP (REPAP) protocol in subjects with previous PAP failure assessed original technology (masks, modes, and pressures) in 273 subjects, of which 70% reported co-occurring psychiatric conditions. The REPAP protocol emphasized changes in pressure modes and settings to address expiratory pressure intolerance and residual breathing events; mask changes were facilitated...
February 21, 2017: Respiratory Care
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